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(No Model.) 2 Sheets-Sheet 1.

v H'QH1SHELDON. REMOVABLE OVEN FOR COMBINED GOAL AND GAS BURNING STOVES.

' Patented Feb. 10, 1885';

INVENTEIR.

N. PETERS. Phoxo-Lnhngmpher. W-lshil glvn. u. c.

(No Model.) 2 Sheets-Sheet '2.

H. H. SHELDON.

REMOVABLE OVEN FOR COMBINED GOAL AND GAS BURNING STOVE S. No. 312,172. Patented Feb. 10, 1885.

V K6 I WITNESSES v INVENTOR J .@c 6 wm, I my S Jfi m a; H.

N. PETERS. Phnln-LxlhogrinphurfWashinglun.ILC,

wire TATES ATENT tries.

HENRY H. SHELDON, OF PAXVTUGKET, RHODE ISLAND, ASSIGNOR TO PHILLIP O. SHELDON, OF SAME PLACE.

REMOVABLE OVEN FOR COMBINED COAL AND GAS BURNING STOVES.

SPECIFICATION farming part of Letters Patent No. 312,172, dated February 10, 1885.

Application filed November 28, 1884. (No model.)

and useful lmprovementsin Removable Ovens for Combined Coal and Gas Burning Stoves; and I do hereby declare the following to bee. full, clear, and exact description of the invention, such as. will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawiu gs, and to letters or figures of ref erence marked thereon, which form a part of this specification.

My present invention relates to stoves or ranges adapted to be used for culinary pur poses; and it consists,essentially, of a removable oven adapted to be secured within the baking or roasting oven of a coal-burning stove, in combination with suitably-arranged gas-burners, dues, and damperswhereby said coalstove oven is converted into an oven adapted to be heated by gas introduced through the walls of the stove.

Gas-burning stoves adapted to fully meet the requirements of hotel or family needs are necessarily very expensive in first cost, beside the additional rooni occupied by them.

By means of my invention coal-burning stoves can be readily converted into gas-burning stoves with comparatively slight expense, such improved stoves at the same time possessing all the culinary advantages of the 5 former-class.

It is not, broadly, new to introduce gas into a stove adapted for burning coal and wood; but such attempts have been attended with partial or complete failure when the gas has been used for heating ovens, owing, partly, to the fact that the intense heat soon warps and cracks the thin iron plates covering the bottom of the oven. The arrangement of the draft-fines also prevents the top ofsuch ovens becoming sufliciently heated.

The object of this invention is to convert and adapt the ordinary type of coal-burning stoves into gas-burning stoves by slightly changing the construction of the oven-bas' e, together with the addition of one or more dampers. Asheet-metal oven is then inserted into the stove-oven flushwith its face,

leaving a space for the circulation of the heated air between the walls of said ovens. A projecting flange secured to the inner oven, however, serves to close the air-space all around in front.

In the accompanying sheet of drawings, Figure 1 represents a perspective view of the sheet-metal oven, having a projecting flange at its front end,. all as adapted to be lnserted within the even of a coal-burning stove. Fig. 2 is a vertical longitudinal section on line ww of Fig. 3, showing the removable ovens, burners, and .dannpers inposition as in use when heated by gas introduced through the walls of the stove.v Fig. 31's a vertical transverse section of the same on line x 90 of Fig. 2. Fig. 4

'is a reduced horizontal sectional View taken through the top flue of the stove on line 0 0 0t Fi 3. Fig. 5 is a reduced plan view of the removable sheet-metal oven as provided with a damper for ventilating the same; and

Fig. 6 is a transverse reduced sectional view on iinemmof-Fig. 2,sl1owing adamper formed in the side wall of the main oven or the stove adapted to allow the waste produotsof combustion from the burning gas to escape into the main flue and thence to the chimney. Fig. 7 represents a perspective view of the base-plate of the oven and the base-plate of the bottom horizontal flue: This view also shows a central transverse flue-partition, and the lid or plate for covering the opening in the base-plate when. the stove is to be used for coal. Fig. 8 is a section on the line y y of Fig. 7. In said Fig. 8 the lids are shown covering the openings 70 k.

The following is a description of this invention and its method of operation.

A, again referring to the drawings, designates a coal-burning stove or range complete as provided with the removableoven, together with suitable burners and dampers,thus adapting the stove to be heated by hydrocarbon gas and us d for culinary purposes.

a designates the fire-pot, and a the ashpan.

B represents the oven,and E the sub-oven, or hot-closet, as common to most styles of coal-burning stoves.

0 represents a partition dividing the rear and bottom fines, 0 c longitudinally, as fully shown.

IOU

c designates the upper fine above the oven ing-chamber also. In the latter event, how- B, having a partition, 6, therein, and also ever, a damper, d, Fig. 5, should be opened having a partition or damper, e, forming a contlnuation of said partition 6.

Now, in order to adapt the foregoing-described stove into agas burning stove, Iplace a damper,-i, in the rear flue, 0, thus dividing said flue into upper and lower chambers. A damper or register, h, opening into the oven B, is formed in one of its top or side walls, as most convenient. An opening, it, is formed in the base-plate of the oven, adapted to be closed by a closely-fitting plate or lid, k Said lid is provided with a flange, k, that fits into the rectangular recess k in the baseplate. One or more openings, k, are formed in the base of the flue 0*, open'ng into the oven E. The latter openings are also adapted to be closed by lids I06. Said lids are provided with flanges similar to the flange on lid is".

B designates the portable sheet-metal oven, having slides b therein, and, further, having an exterior flange, b, extending around the front edge of the oven, as shown in Fig. 1. The oven is also provided with stops d at its rear end, together with suitable bottom supports. (See Fig. 3.) The flange b is adapted to just fill the mouth of the oven B, and to be flush therewith when the inner oven is inserted within the former one, thereby adapting the door B to be closed. Said flange and stops serve to form an air-space, 12, around the exteriorof the inner oven, as fully shown.

a m designate an ordinary type of atmospheric burners inserted through the rear wall of the stove into the top fine, 0, and back flue, c,said burners being provided with stop-cocks 0 and connecting gas-pipes p. The burners and connections may be permanently attached to the stove, if desired.

The operation of a stove provided with my improvements may be described as follows: The flue c is first closed or divided by means of the damper z. The damper h of the oven B. above the damper 17, is then partially or fully opened, as may be required. The oven B is now inserted and the door B closed, followed by turning on and igniting the gas flowing from the lower burners of the flue 0 the heat therefrom passing into and filling the space 1) around the oven B, (see arrow direction,) from whence it issues into the flues c and 0 through the opening which is regulated by the damper h, thence escaping into the chimney. Additional air for the burning g ais is supplied through the lower openings, \1 u The burners are adapted to be connected with the gas-supply by means of a flexible or other tubing, as common. The oven B is thus quickly and uniformly heated. In fact, it will bake better than an oven heated by burning coal, as the temperature can be regulated to a nicety.

The oven B is adapted to be used as a broilfor the purpose of ventilating the oven.

After use the stove A is readily adapted again for coal-burning by simply removing the oven and closing the openings k and the damper h, the flue-damper at the same time being opened. Said openings are closed by the lids k 756.

It is obvious that the burners m may be introduced at the back or even at the front of the stove without departing from the spirit of the invention. The burners also may be per manently connected with the stove. In such case, however, a cap is to be placed over the ends of the burners to prevent the entrance of ashes, &c.

Having thus described my invention, what I claim as new. and desire to secure by Letters Patent of the United States, is-

1. The combination, with the baking-oven of a fuel-burning stove, of the removable metal oven herein described within the same, and gas-burners for heating said oven, and a supply-pipe therefor introduced through the walls of the stove, substantially as shown, and for the purpose set forth.

2. In a fuel-burning stove having one or more ovens, the damperh, opening k, the bottom flue, 6", rear flue, a, and upper flue, c, the combination therewith of the damper 1', located in the rear fine, substantially as described, and for the purposes set forth.

3. In a fuel-burning stove having one or more ovens, the bottom flue, 0 rear flue, c, and upper fine, 0, and damper a, the combination therewith of the register or damper h, opening into the stove-oven B, above the damper i, substantially as shown, and for the purpose set forth.

4. In a fuel-burning stove having one or more ovens provided with the top, rear, and bottom flues, c c 0 and dampers h herein described, and further provided with one or more apertures, k lc,opening into said oven and fines, the combination therewith ot' the oven B, detachably secured within the oven B, an air-space, 12, around the exterior of the inner oven, whereby the latter is adapted to be heated by means of gas introduced through the walls of the stove, the whole arranged and adapted for use substantially as shown and set forth.

5. The sheet-metal oven B herein described, having the front exterior flange, b, and a ventilating-damper, in combination with a stoveoven and means for supporting said sheetmetal oven in the stove'oven, substantially as shown and set forth.

In testimony whereof I have affixed my signature in presence of two witnesses.

HENRY H. SHELDON.

Witnesses:

CHARLES HANNIGAN, GEO. H. REMINGTON. 

